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To use the Pythagorean theorem you need to know at least two sides and the fact that the triangle is right angled, or al three sides.

Even though you may not know the sides explicitly there must be indirect information to give you the sides - otherwise you cannot use Pythagoras.

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Q: How do you use Pythagorean theorem when you don't know any side of the triangle?
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How do you find the pythagorean theorem of a triangle?

The Pythagorean theorem is a2 + b2 = c2. It is used for right triangles. If you know two of the sides, you can use the theorem to find the third side.


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The Pythagorean theorem is used to find the length of a certain side in a right triangle. If you know the length of two sides of a right triangle, you can use the Pythagorean theorem, a2+ b2 = c2, to find the length of the other side. In the formula, c is the hypotenuse, which the longest side of the triangle.


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Since the Pythagorean theorem has 3 variables (the 3 sides), and you only know one variable, you cannot use it to solve for the other 2 variables. Do you know any other information (like angles)? that can be used to solve the triangle (you would not be using the Pythagorean theorem, though). Did they mark the 2 legs with little 'tick marks' denoting that they are equal? Then you could use the Pythagorean theorem because then you know 2 varaibles, and you can solve for the third variable.


What can be found using the pythagorean theorem formula?

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